毫无结果

After repeated but fruitless demands for payment,he brought a suit against the debtor.

在再三要求支付而毫的,他向债务人提出诉讼。

Their search for the plane is fruitless.

他们对飞机的搜寻是毫的。

Our first experiment was a blind alley, but the second one gave us very promising results.

我们的第一试验毫，不过第二试验取得了十分可喜的。

This is a barren argument.

这是一场毫的争论。